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CHAPTER 11 PROGRAMMING
11
11.3 Using Link Special Relay (SB) and Link Special Register (SW)
(10) Checking CPU module status
CPU module status is checked by CC-Link IE Field Network diagnostics, but can also be checked through link
special relays (SB) and link special registers (SW). ( Page 124, CHAPTER 9)
(a) Checking the CPU module status (other stations)
1. Whether the CPU module is in RUN or STOP can be checked by the following link special relays
(SB) and link special register (SW).
• CPU RUN status (master station) (SB00F1)
• When CPU RUN status (each station) (SB00F0) is turned on, check the station number using CPU RUN
status (each station) (SW00F0).
2. A continuation error of the CPU module can be checked by the following link special relays (SB)
and link special register (SW).
• CPU operation status (master station) (2) (SB0111)
• When CPU operation status (each station) (2) (SB0110) is turned on, check the station number using
Operation status (each station) (2) (SW0110).
3. A stop error of the CPU module can be checked by the following link special relays (SB) and link
special register (SW).
• CPU operation status (master station) (1) (SB0101)
• When CPU operation status (each station) (1) (SB0100) is turned on, check the station number using
Operation status (each station) (1) (SW0100).
(b) Checking safety CPU module status (own station)
1. Whether the safety CPU module is in RUN or STOP can be checked by CPU RUN status (own
station) (SB004C).
2. If a continuation error occurs in the safety CPU module, Own station's CPU status (1) (SB004A)
turns on.
If a stop error occurs in the safety CPU module, Own station's CPU status (2) (SB004B) turns on.
3. The safety CPU module status can be checked by Own station's CPU status (SW004B).
Number Description Number Description
SB00F0 CPU RUN status (each station) SW00F0 CPU RUN status (each station)
SB00F1 CPU RUN status (master station)
SB0100 CPU operation status (each station) (1) SW0100 Operation status (each station) (1)
SB0101 CPU operation status (master station) (1)
SB0110 CPU operation status (each station) (2) SW0110 Operation status (each station) (2)
SB0111 CPU operation status (master station) (2)
Number Description Number Description
SB004A Own station's CPU status (1)
SB004B Own station's CPU status (2) SW004B Own station's CPU status
SB004C CPU RUN status (own station)